Fennis Willem M M, Kuijs Ruud H, Kreulen Cees M, Roeters F Joost M, Creugers Nico H J, Burgersdijk Rob C W
Department of Oral Function and Prosthetic Dentistry, College of Dental Sciences, University of Nijmegen, The Netherlands.
Int J Prosthodont. 2002 Nov-Dec;15(6):559-63.
This study was conducted to expand the knowledge on the incidence of complete cusp fractures of posterior teeth in Dutch general practices.
During a 3-month period, data were obtained from 28 general practitioners, representing 46,394 patients. For each new case of complete cusp fracture, clinicians recorded information using a standard form with questions relating to location of the fracture, cause of fracture, and restorative status of the tooth prior to the cusp fracture.
There were 238 cases of complete cusp fracture recorded. The results of this study indicate an incidence rate of cusp fractures of 20.5 per 1,000 person-years at risk. Molars were more frequently registered with cusp fractures than premolars (79% vs 21%). Maxillary molars presented more fractures of buccal cusps (66% vs 34%), while mandibular molars presented more fractures of lingual cusps (75% vs 25%). Almost 77% of the cases had been restored on three or more surfaces. Statistical analysis revealed a positive correlation between history of endodontic treatment and subgingival fracture location. Mastication was most frequently reported as the cause for fracture (54%), although one can argue whether the occlusal force was the cause or the immediate reason.
This study revealed that complete cusp fracture is a common phenomenon in dental practice and has shown differences in cusp fracture with respect to tooth type and restorative status of the tooth. Teeth with a history of endodontic treatment are susceptible to unfavorable subgingival fracture locations.
本研究旨在拓展对荷兰全科医疗中后牙全牙尖折断发生率的认识。
在3个月的时间里，从28位全科医生处获取了数据，这些医生代表了46394名患者。对于每一例新的全牙尖折断病例，临床医生使用标准表格记录信息，表格中的问题涉及骨折位置、骨折原因以及牙尖折断前牙齿的修复状况。
共记录了238例全牙尖折断病例。本研究结果表明，牙尖折断的发生率为每1000人年有20.5例。磨牙发生牙尖折断的记录比前磨牙更频繁（79%对21%）。上颌磨牙颊尖折断更多见（66%对34%），而下颌磨牙舌尖折断更多见（75%对25%）。几乎77%的病例在三个或更多表面进行过修复。统计分析显示，根管治疗史与龈下骨折位置之间存在正相关。咀嚼是最常被报告的骨折原因（54%），尽管有人可能会争论咬合力是原因还是直接诱因。
本研究表明，全牙尖折断在牙科实践中是一种常见现象，并且在牙尖折断方面显示出牙齿类型和牙齿修复状况的差异。有根管治疗史的牙齿易发生不利的龈下骨折位置。
